The company had clocked a net profit of Rs 117.05 crore in the year-ago period, it said in a BSE filing.
Total consolidated income of the firm fell by 25 per cent to Rs 2,016.82 crore in the July-September quarter this fiscal from Rs 2,701.93 crore during the same quarter in 2015-16.
The company's total expenses were higher at Rs 1,776.28 crore from Rs 1,687.03 crore earlier.
In the April-June quarter, the company had reported a consolidated net loss of Rs 448.88 crore against a net loss of Rs 316.52 crore in the corresponding quarter of previous fiscal.
Lanco is present in five sectors -- power, solar, natural resources, infrastructure and property development.